Where do you refill the refrigerant on a Pontiac Aztek?

To refill the refrigerant on a Pontiac Aztek, locate the low-pressure service port, which is typically found on the larger diameter aluminum line between the evaporator and the compressor. Remove the cap from the service port and attach the refrigerant recharge hose. Be sure to follow the manufacturer's specifications for the type of refrigerant and the correct pressure levels during the refill process. Always check for leaks after refilling to ensure proper functioning of the air conditioning system.